Concrete mixer with lifting and tilting mechanism



CONCRETE MIXER WITH LIFTING AND TILTING MECHANISM Filed Feb. 16, 1951 I 'VVENTORj KIDOLPH l7. W/IGNEZ FY FIRNOLD J. WERNEE M wwww HTTUIPNEYS Patented Dec. 29, 1953 CONCRETE MIXER WITH LIFTING AND TILTING MECHANISM Adolph A. 'Wagner, Milwaukee, and Arnold J,

Werner, Elm Grove, Wis., assignors to Wagner VIronWorks, Milwaukee, Wis., a corporation, of

Wisconsin- Application' February 16, 195.1, SerialNo. 211,418

9 Claims. 1 This invention relates to a concrete mixer at- -=tachment for tractors, and particularly to those tractors equipped with pivotal dipper sticks of the type described in our co-pending application Serial No; 148,961,'filed March 10, 1950, and entitled HydraulicFront End Power Lift Attachment for Tractors.

It is a principal object of the invention to provvide a concrete mixing attachment which is in- :terchangeable with other apparatus of the type disclosed in the aforenoted patent application,

and which may be interconnected with the hy- :draulic motorfof the dipper stick in such a way that the concretemixer may be pivoted by the motor between mixing and mix discharge position..

Another object of the. invention is to provide the mixer attachment with an elongated spout which/is useful for loading the mixer and delivering the mix. After the aggregate isproperly mixed, the hydraulic motor is .used to freely pivot :theconcrete mixer toqa mixdepositing position ;in which the mixed load will be delivered to a selected area well past the platform on which the mixer is mounted. The spout also serves as a loading chute to permit :the tractor to drive .the spout into a mound of unmixed aggregate to-force the aggregate into the mixer prior to mixing. Accordingly, all :mixer loading and discharging operations are powered by the tractor at the control of. the tractor operator and without the intervention of others.

Other objects and advantages of the invention will be moreapparent from an examination of the following disclosure.

In the drawings:

Fig. 1 is a perspective view ofapparatusembodying the invention.

,Fig. 2:is aside elevational view on an enlarged 'scale of "the mixer attachment and portions of the associatedapparatus shown in Fig. ,1.

7 As more fully described inv our aforesaid co- "pending application, a tractor ,5 may be provided with a main or base frame 6 which has a transverse bearing tube lupon which a dipper stick, indicated generally as a tubular fabricated framework at 8, is pivotally mounted. The dipper stick comprises spacedcantilever arms H each provided with a suitable tension rod 12 and upstanding, central strut .lli. Therear ends of the levers l I are pivoted on the bearing tube 1 V-by means-of .a transverse rock shaft H which mutually-engages the bearing tube l'of the main frame 6 and the socketed ends of the levers l I. The dipper stick is'powered in its swingable 2 movement on rock shaft 13 by dual hydraulic motors l4, which are pivotally connectedwit-h the respective underslung dipper stick elbows I 5 at each side of the tractor.

The base frame 6 is further provided with an upstanding mast I3 mounted vertically on the hearing tube 3. 'Parallel'ogram arms ll are pivotally mounted to the mast and extend-forward-1y to a connection with the platform standards 22 as hereinafter described. The mast is braced in upstanding position by the rearwardly extending braces it which have terminal connections'with the base frame.

To the front, elevatable end of the dipper stick arms H is pivoted a: platform comprising, in the preferred embodiment, forwardly extending forks 2 I and upright rear members or standards 22. The pivotal connection of the platform to the dipper stick comprises removable pins '23 which engage the platform near the junction of the fork-membersil and upstanding members 22. The'parallelogram arms or rods I; are pivotal-ly connected tothe standards at 24; near their respective upper ends, and extend substantially parallel to thedipper stick arms ll. Accordingly, the resultant parallelogram action will assure that the platform fork members 2%! remain horizontal in all positions of dipper stick and platform elevation.

. The concrete mixer attachment comprises spaced. .A.-fr.ame members 25 which are securely mounted on, the platform. forks upon their rear legs by means of bolts l9 which engage the standards 22. The front legs. of the A.-frames 2-5wrest .on the spaced forks 2i, and are interconnected bythe tie bar 2% which laterallybraces theA-frames. The respective A-frames; are-proi-vided at their apices with hearing brackets 26 are journaled. axially aligned stub. shafts 21 which rockably support a rctary concrete mixer hopper, indicated generally as.,2:8.

The concrete 23 rotates on anaxis transverse ,to'its rockabie axis on stub shafts 2i; and driven by engine 3!. Engine 3i=ismounted on the cross members iiiiwof the A-frames: and is connected through chain drive 32 to the annular or ring gear 3.3 onthe rotary partof, the mixer, Engine 3! rotates the mixer on an axis transversely related to therockable axis "upon which the mixer pivots between extreme posi-- tions, such as a mixing position, shown inFig. 2, and almiix discharge position, shown :inEig. 1.

As mercifully pointed out in the-aforesaid 1copendingapplication, dipper stick 8; is provided with a hydraulic motor 35. The hydraulicsmotor is pivotally mounted on pin 3'! to a bracket 38 on cross connection 34 which spans the dipper stick arms and is supported upon the struts l8. Hydraulic motor 36 is provided with an extensible operating member or piston rod ll which extends to a pivotal connection through pin 42 with a crank arm 43 rigidly connected by means of welding or the like at 44 to the non-rotary part of the concrete mixer 28.

Hydraulic motor 36 is powered from the hydraulic system of the tractor through the hydraulic fluid lines 45 and which extend along the dipper stick to a valve control indicated generally as 61. Valve 41 is disposed within the reach of the tractor operator and provides a remote control by means of which the concrete mixer may be tilted on its horizontal axis 21 between loading, mixing, transporting and discharge position. The range of concrete mixer pivotal movement is illustrated by the full and dotted line positions of the mixer shown in Fig. 2. During pivotal movement of the mixer the hydraulic motor 35 will also change position on its respective pivots 31 and i2 to accommodate mixer movement, as best shown in the full and dotted lines in Fig. 2.

To provide for the most effective use of the mixer, its throat 35 is elongated by a tubular pick up and delivery spout E6 so that in mixer loading and discharge positions it extends past the ends of the forks 2|. By reason of this elongation the mixer can be tilted to lowermost position to discharge its mixed contents free and clear of the outer ends of the forks 2i and to properly deposit the mix at the local area where it is needed. The provision of the spout 56 further permits the tractor to drive the spout into a mound of unmixed aggregate, indicated diagrammatically as 40, to load the mixer. In this manner, the loading and unloading of the mixer may be powered solely by the tractor as controlled by the tractor operator, no other personnel being needed to load the mixer or to deposit the mixed concrete. The tractor may move from a loading station to the area where the concrete is needed, mixing taking place en route.

From the foregoing description, taken in connection with the accompanying drawings, it is seen that a concrete mixer attachment has been provided which may be simply and interchangeably mounted upon the dipper stick equipment of a tractor. The hydraulic motor on the dipper stick may be connected to the mixer whereby the mixer may be power tilted through loading, mixing, and depositing positions solely at the control of the tractor operator. While the mixer hopper may be loaded manually in lowered position, and then the entire mixer bodily elevated by the operator to discharge the mix wherever desired, the novel mounting of the entire mixer on the dipper stick platform, and the provisions for the loading spout makes it possible for the operator to load the hopper by using the forward motion of the tractor to drive the spout into a mound of dry aggregate.

While the mixer attachment has been described with particular reference to a concrete mixer, it is evident that the use of the mixer is not thus limited, since it may also be adapted to other mixing purposes. a

We claim:

1. In a device of the character described, and including a tractorprovided with a dipper stick pivotally mounted on the tractor, said dipper stick being provided with a hydraulic motor at its front end and means under control of the tractor operator for the control of said motor, a mixer attachment comprising a mounting frame having connections for attaching the frame to the front end of the dipper stick, a mixer, said frame being provided with a horizontal pivot upon which the mixer is mounted to pivot between mixing and discharge positions, said mixer further comprising a connection to which the hydraulic motor may be attached whereby pivotal movement of the mixer on its pivot between mixing and discharge positions, at the control of said operator, is powered by said motor, said mixer being movable on said dipper stick to a plurality of elevated positions within the range of dipper stick pivotal movement.

2. The device of claim 1 wherein the attachment further comprises a power source for the mixer, said mixer being mounted on the horizontal pivot to rotate on an axis transverse to the horizontal axis, said power source being supported by the mounting frame and having driving connections to the mixer.

3. The device of claim 1 wherein the connection from the hydraulic motor to the mixer comprises a crank on the mixer, said motor having pivotal connections both to the crank and the dipper stick to articulate freely on both said connections, said motor constituting a link of adjustable length between the mixer and the dipper stick.

4. The device of claim 1 wherein the mixer is provided. with an elongated throat extending past the mounting frame when the rotary axis of the mixer is horizontal whereby the mixer may load and deposit mix with respect to positions beyond the end of the frame.

5. The device of claim 4 wherein the throat comprises an annular spout separately applicable to the mixer throat.

6. In a device of the character described, the combination with a tractor dipper stick having a pivotal mounting upon which the dipper stick is swingable respecting the tractor, said tractor being further provided with an upstanding mast and with parallelogram arms pivotally connected to the mast, said dipper stick being provided at its free end with a platform having an upstanding portion pivotally connected both to the dipper stick and to the parallelogram arms whereby swinging movement of the dipper stick upon its pivotal mounting will cause the platform to remain level in all positions of dipper stick movement, and a mixer pivotally mounted on said platform, said dipper stick being provided with a hydraulic motor, means under control of the tractor operator for operation of said motor, and a connection from the motor to the said mixer, said motor and connection constituting an adjustable link between the dipper stick and the mixer whereby the position of the mixer on its pivot is determined by the adjustment of said link and the mixer may be pivoted under the control of the tractor operator between a mixing position and a discharge position, said mixer being movable with said platform to all pivotal positions of the dipper stick.

'7. The device of claim 6 wherein the said platform comprises laterally spaced forks, said mixer being further provided with correspondingly laterally spaced A-frame mountings respectively connected to the platform, and a tie bar between said A-frames to laterally brace said frames.

8. An attachment for a powered vehicle having-an elevatable dipper stick provided with a levelized platform support, said attachment comprising a tiltable mixer, means for connecting said mixer to said support and a motor having extensible parts constituting an adjustable link between the dipper stick and the mixer, and means for actuating said motor whereby to tilt the mixer to and from a mixing position and a lowered discharge position.

9. The mixer and motor connection of claim 8 wherein the mixer has a spout extending beyond the platform whereby in a lower tilted position of the mixer a forward movement of the vehicle may cause the spout to scoop mix aggregate into the mixer.

ADOLPH A. WAGNER. ARNOLD J. WERNER.

References Cited in the file of this patent Number UNITED STATES PATENTS Name Date Robb May 3, 1932 Mason Sept. 20, 1932 Clagett, Jr Feb. 17, 1942 Guignard et al May 16, 1944 Beyerstedt Mar. 8, 1949 Simmonds Jan. 17, 1950 Lull Aug. 8, 1950 Werth Aug. 8, 1950 Fuelling Aug. 22, 1950 Lesniak Mar. 13, 1951 

